/*
* X11 video grab interface
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg integration:
+ * Libav integration:
* Copyright (C) 2006 Clemens Fruhwirth <clemens@endorphin.org>
* Edouard Gomez <ed.gomez@free.fr>
*
* Copyright (C) 1997-1998 Rasca, Berlin
* 2003-2004 Karl H. Beckers, Frankfurt
*
- * FFmpeg is free software; you can redistribute it and/or modify
+ * Libav is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with FFmpeg; if not, write to the Free Software
+ * along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file libavdevice/x11grab.c
- * X11 frame device demuxer by Clemens Fruhwirth <clemens@endorphin.org>
- * and Edouard Gomez <ed.gomez@free.fr>.
+ * @file
+ * X11 frame device demuxer
+ * @author Clemens Fruhwirth <clemens@endorphin.org>
+ * @author Edouard Gomez <ed.gomez@free.fr>
*/
#include "config.h"
-#include "libavformat/avformat.h"
+
#include <time.h>
+#include <sys/shm.h>
+
#include <X11/X.h>
#include <X11/Xlib.h>
#include <X11/Xlibint.h>
#include <X11/Xproto.h>
#include <X11/Xutil.h>
-#include <sys/shm.h>
-#include <X11/extensions/XShm.h>
+
+#include <X11/extensions/shape.h>
#include <X11/extensions/Xfixes.h>
+#include <X11/extensions/XShm.h>
-/**
- * X11 Device Demuxer context
- */
-struct x11_grab
-{
+#include "libavutil/log.h"
+#include "libavutil/opt.h"
+#include "libavutil/parseutils.h"
+#include "libavutil/time.h"
+
+#include "libavformat/avformat.h"
+#include "libavformat/internal.h"
+
+/** X11 device demuxer context */
+typedef struct X11GrabContext {
+ const AVClass *class; /**< Class for private options. */
int frame_size; /**< Size in bytes of a grabbed frame */
AVRational time_base; /**< Time base */
int64_t time_frame; /**< Current time */
+ char *video_size; /**< String describing video size, set by a private option. */
int height; /**< Height of the grab frame */
int width; /**< Width of the grab frame */
int x_off; /**< Horizontal top-left corner coordinate */
XImage *image; /**< X11 image holding the grab */
int use_shm; /**< !0 when using XShm extension */
XShmSegmentInfo shminfo; /**< When using XShm, keeps track of XShm infos */
- int nomouse;
-};
+ int draw_mouse; /**< Set by a private option. */
+ int follow_mouse; /**< Set by a private option. */
+ int show_region; /**< set by a private option. */
+ char *framerate; /**< Set by a private option. */
+
+ Window region_win; /**< This is used by show_region option. */
+} X11GrabContext;
+
+#define REGION_WIN_BORDER 3
+
+/**
+ * Draw grabbing region window
+ *
+ * @param s x11grab context
+ */
+static void x11grab_draw_region_win(X11GrabContext *s)
+{
+ Display *dpy = s->dpy;
+ Window win = s->region_win;
+ int screen = DefaultScreen(dpy);
+ GC gc = XCreateGC(dpy, win, 0, 0);
+
+ XSetForeground(dpy, gc, WhitePixel(dpy, screen));
+ XSetBackground(dpy, gc, BlackPixel(dpy, screen));
+ XSetLineAttributes(dpy, gc, REGION_WIN_BORDER, LineDoubleDash, 0, 0);
+ XDrawRectangle(dpy, win, gc, 1, 1,
+ (s->width + REGION_WIN_BORDER * 2) - 1 * 2 - 1,
+ (s->height + REGION_WIN_BORDER * 2) - 1 * 2 - 1);
+ XFreeGC(dpy, gc);
+}
+
+/**
+ * Initialize grabbing region window
+ *
+ * @param s x11grab context
+ */
+static void x11grab_region_win_init(X11GrabContext *s)
+{
+ Display *dpy = s->dpy;
+ XRectangle rect;
+ XSetWindowAttributes attribs = { .override_redirect = True };
+ int screen = DefaultScreen(dpy);
+
+ s->region_win = XCreateWindow(dpy, RootWindow(dpy, screen),
+ s->x_off - REGION_WIN_BORDER,
+ s->y_off - REGION_WIN_BORDER,
+ s->width + REGION_WIN_BORDER * 2,
+ s->height + REGION_WIN_BORDER * 2,
+ 0, CopyFromParent,
+ InputOutput, CopyFromParent,
+ CWOverrideRedirect, &attribs);
+ rect.x = 0;
+ rect.y = 0;
+ rect.width = s->width;
+ rect.height = s->height;
+ XShapeCombineRectangles(dpy, s->region_win,
+ ShapeBounding, REGION_WIN_BORDER, REGION_WIN_BORDER,
+ &rect, 1, ShapeSubtract, 0);
+ XMapWindow(dpy, s->region_win);
+ XSelectInput(dpy, s->region_win, ExposureMask | StructureNotifyMask);
+ x11grab_draw_region_win(s);
+}
+
+static int setup_shm(AVFormatContext *s, Display *dpy, XImage **image)
+{
+ X11GrabContext *g = s->priv_data;
+ int scr = XDefaultScreen(dpy);
+ XImage *img = XShmCreateImage(dpy, DefaultVisual(dpy, scr),
+ DefaultDepth(dpy, scr), ZPixmap, NULL,
+ &g->shminfo, g->width, g->height);
+
+ g->shminfo.shmid = shmget(IPC_PRIVATE, img->bytes_per_line * img->height,
+ IPC_CREAT | 0777);
+
+ if (g->shminfo.shmid == -1) {
+ av_log(s, AV_LOG_ERROR, "Cannot get shared memory!\n");
+ return AVERROR(ENOMEM);
+ }
+
+ g->shminfo.shmaddr = img->data = shmat(g->shminfo.shmid, 0, 0);
+ g->shminfo.readOnly = False;
+
+ if (!XShmAttach(dpy, &g->shminfo)) {
+ av_log(s, AV_LOG_ERROR, "Failed to attach shared memory!\n");
+ /* needs some better error subroutine :) */
+ return AVERROR(EIO);
+ }
+
+ *image = img;
+ return 0;
+}
+
+static int setup_mouse(Display *dpy, int screen)
+{
+ int ev_ret, ev_err;
+
+ if (XFixesQueryExtension(dpy, &ev_ret, &ev_err)) {
+ Window root = RootWindow(dpy, screen);
+ XFixesSelectCursorInput(dpy, root, XFixesDisplayCursorNotifyMask);
+ return 0;
+ }
+
+ return AVERROR(ENOSYS);
+}
+
+static int pixfmt_from_image(AVFormatContext *s, XImage *image, int *pix_fmt)
+{
+ av_log(s, AV_LOG_DEBUG,
+ "Image r 0x%.6lx g 0x%.6lx b 0x%.6lx and depth %i\n",
+ image->red_mask,
+ image->green_mask,
+ image->blue_mask,
+ image->bits_per_pixel);
+
+ switch (image->bits_per_pixel) {
+ case 8:
+ *pix_fmt = AV_PIX_FMT_PAL8;
+ break;
+ case 16:
+ if (image->red_mask == 0xf800 &&
+ image->green_mask == 0x07e0 &&
+ image->blue_mask == 0x001f) {
+ *pix_fmt = AV_PIX_FMT_RGB565;
+ } else if (image->red_mask == 0x7c00 &&
+ image->green_mask == 0x03e0 &&
+ image->blue_mask == 0x001f) {
+ *pix_fmt = AV_PIX_FMT_RGB555;
+ }
+ break;
+ case 24:
+ if (image->red_mask == 0xff0000 &&
+ image->green_mask == 0x00ff00 &&
+ image->blue_mask == 0x0000ff) {
+ *pix_fmt = AV_PIX_FMT_BGR24;
+ } else if (image->red_mask == 0x0000ff &&
+ image->green_mask == 0x00ff00 &&
+ image->blue_mask == 0xff0000) {
+ *pix_fmt = AV_PIX_FMT_RGB24;
+ }
+ break;
+ case 32:
+ *pix_fmt = AV_PIX_FMT_RGB32;
+ break;
+ default:
+ av_log(s, AV_LOG_ERROR,
+ "XImages with RGB mask 0x%.6lx 0x%.6lx 0x%.6lx and depth %i "
+ "are currently not supported.\n",
+ image->red_mask,
+ image->green_mask,
+ image->blue_mask,
+ image->bits_per_pixel);
+
+ return AVERROR_PATCHWELCOME;
+ }
+
+ return 0;
+}
/**
- * Initializes the x11 grab device demuxer (public device demuxer API).
+ * Initialize the x11 grab device demuxer (public device demuxer API).
*
* @param s1 Context from avformat core
- * @param ap Parameters from avformat core
* @return <ul>
* <li>AVERROR(ENOMEM) no memory left</li>
* <li>AVERROR(EIO) other failure case</li>
* <li>0 success</li>
* </ul>
*/
-static int
-x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
+static int x11grab_read_header(AVFormatContext *s1)
{
- struct x11_grab *x11grab = s1->priv_data;
+ X11GrabContext *x11grab = s1->priv_data;
Display *dpy;
AVStream *st = NULL;
- int input_pixfmt;
XImage *image;
- int x_off = 0;
- int y_off = 0;
- int use_shm;
+ int x_off = 0, y_off = 0, ret = 0, screen, use_shm;
char *param, *offset;
+ AVRational framerate;
param = av_strdup(s1->filename);
+ if (!param)
+ goto out;
+
offset = strchr(param, '+');
if (offset) {
sscanf(offset, "%d,%d", &x_off, &y_off);
- x11grab->nomouse= strstr(offset, "nomouse");
- *offset= 0;
+ x11grab->draw_mouse = !strstr(offset, "nomouse");
+ *offset = 0;
}
- av_log(s1, AV_LOG_INFO, "device: %s -> display: %s x: %d y: %d width: %d height: %d\n", s1->filename, param, x_off, y_off, ap->width, ap->height);
+ ret = av_parse_video_size(&x11grab->width, &x11grab->height,
+ x11grab->video_size);
+ if (ret < 0) {
+ av_log(s1, AV_LOG_ERROR, "Couldn't parse video size.\n");
+ goto out;
+ }
- dpy = XOpenDisplay(param);
- if(!dpy) {
- av_log(s1, AV_LOG_ERROR, "Could not open X display.\n");
- return AVERROR(EIO);
+ ret = av_parse_video_rate(&framerate, x11grab->framerate);
+ if (ret < 0) {
+ av_log(s1, AV_LOG_ERROR, "Could not parse framerate: %s.\n",
+ x11grab->framerate);
+ goto out;
}
+ av_log(s1, AV_LOG_INFO,
+ "device: %s -> display: %s x: %d y: %d width: %d height: %d\n",
+ s1->filename, param, x_off, y_off, x11grab->width, x11grab->height);
- if (!ap || ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0) {
- av_log(s1, AV_LOG_ERROR, "AVParameters don't have video size and/or rate. Use -s and -r.\n");
- return AVERROR(EIO);
+ dpy = XOpenDisplay(param);
+ if (!dpy) {
+ av_log(s1, AV_LOG_ERROR, "Could not open X display.\n");
+ ret = AVERROR(EIO);
+ goto out;
}
- st = av_new_stream(s1, 0);
+ st = avformat_new_stream(s1, NULL);
if (!st) {
- return AVERROR(ENOMEM);
+ ret = AVERROR(ENOMEM);
+ goto out;
+ }
+ avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
+
+ screen = DefaultScreen(dpy);
+
+ if (x11grab->follow_mouse) {
+ int screen_w, screen_h;
+ Window w;
+
+ screen_w = DisplayWidth(dpy, screen);
+ screen_h = DisplayHeight(dpy, screen);
+ XQueryPointer(dpy, RootWindow(dpy, screen), &w, &w, &x_off, &y_off,
+ &ret, &ret, &ret);
+ x_off -= x11grab->width / 2;
+ y_off -= x11grab->height / 2;
+ x_off = FFMIN(FFMAX(x_off, 0), screen_w - x11grab->width);
+ y_off = FFMIN(FFMAX(y_off, 0), screen_h - x11grab->height);
+ av_log(s1, AV_LOG_INFO,
+ "followmouse is enabled, resetting grabbing region to x: %d y: %d\n",
+ x_off, y_off);
}
- av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
use_shm = XShmQueryExtension(dpy);
- av_log(s1, AV_LOG_INFO, "shared memory extension %s found\n", use_shm ? "" : "not");
-
- if(use_shm) {
- int scr = XDefaultScreen(dpy);
- image = XShmCreateImage(dpy,
- DefaultVisual(dpy, scr),
- DefaultDepth(dpy, scr),
- ZPixmap,
- NULL,
- &x11grab->shminfo,
- ap->width, ap->height);
- x11grab->shminfo.shmid = shmget(IPC_PRIVATE,
- image->bytes_per_line * image->height,
- IPC_CREAT|0777);
- if (x11grab->shminfo.shmid == -1) {
- av_log(s1, AV_LOG_ERROR, "Fatal: Can't get shared memory!\n");
- return AVERROR(ENOMEM);
- }
- x11grab->shminfo.shmaddr = image->data = shmat(x11grab->shminfo.shmid, 0, 0);
- x11grab->shminfo.readOnly = False;
+ av_log(s1, AV_LOG_INFO,
+ "shared memory extension %sfound\n", use_shm ? "" : "not ");
- if (!XShmAttach(dpy, &x11grab->shminfo)) {
- av_log(s1, AV_LOG_ERROR, "Fatal: Failed to attach shared memory!\n");
- /* needs some better error subroutine :) */
- return AVERROR(EIO);
- }
- } else {
- image = XGetImage(dpy, RootWindow(dpy, DefaultScreen(dpy)),
- x_off,y_off,
- ap->width,ap->height,
- AllPlanes, ZPixmap);
+ if (use_shm && setup_shm(s1, dpy, &image) < 0) {
+ av_log(s1, AV_LOG_WARNING, "Falling back to XGetImage\n");
+ use_shm = 0;
}
- switch (image->bits_per_pixel) {
- case 8:
- av_log (s1, AV_LOG_DEBUG, "8 bit palette\n");
- input_pixfmt = PIX_FMT_PAL8;
- break;
- case 16:
- if ( image->red_mask == 0xf800 &&
- image->green_mask == 0x07e0 &&
- image->blue_mask == 0x001f ) {
- av_log (s1, AV_LOG_DEBUG, "16 bit RGB565\n");
- input_pixfmt = PIX_FMT_RGB565;
- } else if (image->red_mask == 0x7c00 &&
- image->green_mask == 0x03e0 &&
- image->blue_mask == 0x001f ) {
- av_log(s1, AV_LOG_DEBUG, "16 bit RGB555\n");
- input_pixfmt = PIX_FMT_RGB555;
- } else {
- av_log(s1, AV_LOG_ERROR, "RGB ordering at image depth %i not supported ... aborting\n", image->bits_per_pixel);
- av_log(s1, AV_LOG_ERROR, "color masks: r 0x%.6lx g 0x%.6lx b 0x%.6lx\n", image->red_mask, image->green_mask, image->blue_mask);
- return AVERROR(EIO);
- }
- break;
- case 24:
- if ( image->red_mask == 0xff0000 &&
- image->green_mask == 0x00ff00 &&
- image->blue_mask == 0x0000ff ) {
- input_pixfmt = PIX_FMT_BGR24;
- } else if ( image->red_mask == 0x0000ff &&
- image->green_mask == 0x00ff00 &&
- image->blue_mask == 0xff0000 ) {
- input_pixfmt = PIX_FMT_RGB24;
- } else {
- av_log(s1, AV_LOG_ERROR,"rgb ordering at image depth %i not supported ... aborting\n", image->bits_per_pixel);
- av_log(s1, AV_LOG_ERROR, "color masks: r 0x%.6lx g 0x%.6lx b 0x%.6lx\n", image->red_mask, image->green_mask, image->blue_mask);
- return AVERROR(EIO);
- }
- break;
- case 32:
-#if 0
- GetColorInfo (image, &c_info);
- if ( c_info.alpha_mask == 0xff000000 && image->green_mask == 0x0000ff00) {
- /* byte order is relevant here, not endianness
- * endianness is handled by avcodec, but atm no such thing
- * as having ABGR, instead of ARGB in a word. Since we
- * need this for Solaris/SPARC, but need to do the conversion
- * for every frame we do it outside of this loop, cf. below
- * this matches both ARGB32 and ABGR32 */
- input_pixfmt = PIX_FMT_ARGB32;
- } else {
- av_log(s1, AV_LOG_ERROR,"image depth %i not supported ... aborting\n", image->bits_per_pixel);
- return AVERROR(EIO);
- }
-#endif
- input_pixfmt = PIX_FMT_RGB32;
- break;
- default:
- av_log(s1, AV_LOG_ERROR, "image depth %i not supported ... aborting\n", image->bits_per_pixel);
- return -1;
+ if (!use_shm) {
+ image = XGetImage(dpy, RootWindow(dpy, screen),
+ x_off, y_off,
+ x11grab->width, x11grab->height,
+ AllPlanes, ZPixmap);
}
- x11grab->frame_size = ap->width * ap->height * image->bits_per_pixel/8;
- x11grab->dpy = dpy;
- x11grab->width = ap->width;
- x11grab->height = ap->height;
- x11grab->time_base = ap->time_base;
- x11grab->time_frame = av_gettime() / av_q2d(ap->time_base);
- x11grab->x_off = x_off;
- x11grab->y_off = y_off;
- x11grab->image = image;
- x11grab->use_shm = use_shm;
-
- st->codec->codec_type = CODEC_TYPE_VIDEO;
- st->codec->codec_id = CODEC_ID_RAWVIDEO;
- st->codec->width = ap->width;
- st->codec->height = ap->height;
- st->codec->pix_fmt = input_pixfmt;
- st->codec->time_base = ap->time_base;
- st->codec->bit_rate = x11grab->frame_size * 1/av_q2d(ap->time_base) * 8;
+ if (x11grab->draw_mouse && setup_mouse(dpy, screen) < 0) {
+ av_log(s1, AV_LOG_WARNING,
+ "XFixes not available, cannot draw the mouse cursor\n");
+ x11grab->draw_mouse = 0;
+ }
- return 0;
+ x11grab->frame_size = x11grab->width * x11grab->height * image->bits_per_pixel / 8;
+ x11grab->dpy = dpy;
+ x11grab->time_base = (AVRational) { framerate.den, framerate.num };
+ x11grab->time_frame = av_gettime() / av_q2d(x11grab->time_base);
+ x11grab->x_off = x_off;
+ x11grab->y_off = y_off;
+ x11grab->image = image;
+ x11grab->use_shm = use_shm;
+
+ ret = pixfmt_from_image(s1, image, &st->codec->pix_fmt);
+ if (ret < 0)
+ goto out;
+
+ st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+ st->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
+ st->codec->width = x11grab->width;
+ st->codec->height = x11grab->height;
+ st->codec->time_base = x11grab->time_base;
+ st->codec->bit_rate = x11grab->frame_size * 1 / av_q2d(x11grab->time_base) * 8;
+
+out:
+ av_free(param);
+ return ret;
}
/**
- * Paints a mouse pointer in an X11 image.
+ * Paint a mouse pointer in an X11 image.
*
* @param image image to paint the mouse pointer to
* @param s context used to retrieve original grabbing rectangle
* coordinates
- * @param x Mouse pointer coordinate
- * @param y Mouse pointer coordinate
*/
-static void
-paint_mouse_pointer(XImage *image, struct x11_grab *s)
+static void paint_mouse_pointer(XImage *image, X11GrabContext *s)
{
- int x_off = s->x_off;
- int y_off = s->y_off;
- int width = s->width;
- int height = s->height;
+ int x_off = s->x_off;
+ int y_off = s->y_off;
+ int width = s->width;
+ int height = s->height;
Display *dpy = s->dpy;
XFixesCursorImage *xcim;
int x, y;
int line, column;
int to_line, to_column;
- int image_addr, xcim_addr;
+ int pixstride = image->bits_per_pixel >> 3;
+ /* Warning: in its insanity, xlib provides unsigned image data through a
+ * char* pointer, so we have to make it uint8_t to make things not break.
+ * Anyone who performs further investigation of the xlib API likely risks
+ * permanent brain damage. */
+ uint8_t *pix = image->data;
- xcim = XFixesGetCursorImage(dpy);;
+ /* Code doesn't currently support 16-bit or PAL8 */
+ if (image->bits_per_pixel != 24 && image->bits_per_pixel != 32)
+ return;
+
+ xcim = XFixesGetCursorImage(dpy);
+ if (!xcim)
+ return;
x = xcim->x - xcim->xhot;
y = xcim->y - xcim->yhot;
- to_line = FFMIN((y + xcim->height), (height + y_off));
- to_column = FFMIN((x + xcim->width), (width + x_off));
+ to_line = FFMIN((y + xcim->height), (height + y_off));
+ to_column = FFMIN((x + xcim->width), (width + x_off));
for (line = FFMAX(y, y_off); line < to_line; line++) {
for (column = FFMAX(x, x_off); column < to_column; column++) {
- xcim_addr = (line - y) * xcim->width + column - x;
-
- if ((unsigned char)(xcim->pixels[xcim_addr] >> 24) != 0) { // skip fully transparent pixel
- image_addr = ((line - y_off) * width + column - x_off) * 4;
-
- image->data[image_addr] = (unsigned char)(xcim->pixels[xcim_addr] >> 0);
- image->data[image_addr+1] = (unsigned char)(xcim->pixels[xcim_addr] >> 8);
- image->data[image_addr+2] = (unsigned char)(xcim->pixels[xcim_addr] >> 16);
+ int xcim_addr = (line - y) * xcim->width + column - x;
+ int image_addr = ((line - y_off) * width + column - x_off) * pixstride;
+ int r = (uint8_t)(xcim->pixels[xcim_addr] >> 0);
+ int g = (uint8_t)(xcim->pixels[xcim_addr] >> 8);
+ int b = (uint8_t)(xcim->pixels[xcim_addr] >> 16);
+ int a = (uint8_t)(xcim->pixels[xcim_addr] >> 24);
+
+ if (a == 255) {
+ pix[image_addr + 0] = r;
+ pix[image_addr + 1] = g;
+ pix[image_addr + 2] = b;
+ } else if (a) {
+ /* pixel values from XFixesGetCursorImage come premultiplied by alpha */
+ pix[image_addr + 0] = r + (pix[image_addr + 0] * (255 - a) + 255 / 2) / 255;
+ pix[image_addr + 1] = g + (pix[image_addr + 1] * (255 - a) + 255 / 2) / 255;
+ pix[image_addr + 2] = b + (pix[image_addr + 2] * (255 - a) + 255 / 2) / 255;
}
}
}
xcim = NULL;
}
-
/**
- * Reads new data in the image structure.
+ * Read new data in the image structure.
*
* @param dpy X11 display to grab from
* @param d
* @param y Top-Left grabbing rectangle vertical coordinate
* @return 0 if error, !0 if successful
*/
-static int
-xget_zpixmap(Display *dpy, Drawable d, XImage *image, int x, int y)
+static int xget_zpixmap(Display *dpy, Drawable d, XImage *image, int x, int y)
{
xGetImageReply rep;
xGetImageReq *req;
long nbytes;
- if (!image) {
+ if (!image)
return 0;
- }
LockDisplay(dpy);
GetReq(GetImage, req);
/* First set up the standard stuff in the request */
- req->drawable = d;
- req->x = x;
- req->y = y;
- req->width = image->width;
- req->height = image->height;
+ req->drawable = d;
+ req->x = x;
+ req->y = y;
+ req->width = image->width;
+ req->height = image->height;
req->planeMask = (unsigned int)AllPlanes;
- req->format = ZPixmap;
+ req->format = ZPixmap;
if (!_XReply(dpy, (xReply *)&rep, 0, xFalse) || !rep.length) {
UnlockDisplay(dpy);
}
/**
- * Grabs a frame from x11 (public device demuxer API).
+ * Grab a frame from x11 (public device demuxer API).
*
* @param s1 Context from avformat core
* @param pkt Packet holding the brabbed frame
* @return frame size in bytes
*/
-static int
-x11grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
+static int x11grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
{
- struct x11_grab *s = s1->priv_data;
- Display *dpy = s->dpy;
- XImage *image = s->image;
- int x_off = s->x_off;
- int y_off = s->y_off;
-
+ X11GrabContext *s = s1->priv_data;
+ Display *dpy = s->dpy;
+ XImage *image = s->image;
+ int x_off = s->x_off;
+ int y_off = s->y_off;
+ int follow_mouse = s->follow_mouse;
+ int screen, pointer_x, pointer_y, _, same_screen = 1;
+ Window w, root;
int64_t curtime, delay;
struct timespec ts;
s->time_frame += INT64_C(1000000);
/* wait based on the frame rate */
- for(;;) {
+ for (;;) {
curtime = av_gettime();
- delay = s->time_frame * av_q2d(s->time_base) - curtime;
+ delay = s->time_frame * av_q2d(s->time_base) - curtime;
if (delay <= 0) {
- if (delay < INT64_C(-1000000) * av_q2d(s->time_base)) {
+ if (delay < INT64_C(-1000000) * av_q2d(s->time_base))
s->time_frame += INT64_C(1000000);
- }
break;
}
- ts.tv_sec = delay / 1000000;
+ ts.tv_sec = delay / 1000000;
ts.tv_nsec = (delay % 1000000) * 1000;
nanosleep(&ts, NULL);
}
- if (av_new_packet(pkt, s->frame_size) < 0) {
- return AVERROR(EIO);
- }
+ av_init_packet(pkt);
+ pkt->data = image->data;
+ pkt->size = s->frame_size;
+ pkt->pts = curtime;
- pkt->pts = curtime;
+ screen = DefaultScreen(dpy);
+ root = RootWindow(dpy, screen);
- if(s->use_shm) {
- if (!XShmGetImage(dpy, RootWindow(dpy, DefaultScreen(dpy)), image, x_off, y_off, AllPlanes)) {
- av_log (s1, AV_LOG_INFO, "XShmGetImage() failed\n");
+ if (follow_mouse || s->draw_mouse)
+ same_screen = XQueryPointer(dpy, root, &w, &w,
+ &pointer_x, &pointer_y, &_, &_, &_);
+
+ if (follow_mouse && same_screen) {
+ int screen_w, screen_h;
+
+ screen_w = DisplayWidth(dpy, screen);
+ screen_h = DisplayHeight(dpy, screen);
+ if (follow_mouse == -1) {
+ // follow the mouse, put it at center of grabbing region
+ x_off += pointer_x - s->width / 2 - x_off;
+ y_off += pointer_y - s->height / 2 - y_off;
+ } else {
+ // follow the mouse, but only move the grabbing region when mouse
+ // reaches within certain pixels to the edge.
+ if (pointer_x > x_off + s->width - follow_mouse)
+ x_off += pointer_x - (x_off + s->width - follow_mouse);
+ else if (pointer_x < x_off + follow_mouse)
+ x_off -= (x_off + follow_mouse) - pointer_x;
+ if (pointer_y > y_off + s->height - follow_mouse)
+ y_off += pointer_y - (y_off + s->height - follow_mouse);
+ else if (pointer_y < y_off + follow_mouse)
+ y_off -= (y_off + follow_mouse) - pointer_y;
}
- } else {
- if (!xget_zpixmap(dpy, RootWindow(dpy, DefaultScreen(dpy)), image, x_off, y_off)) {
- av_log (s1, AV_LOG_INFO, "XGetZPixmap() failed\n");
+ // adjust grabbing region position if it goes out of screen.
+ s->x_off = x_off = FFMIN(FFMAX(x_off, 0), screen_w - s->width);
+ s->y_off = y_off = FFMIN(FFMAX(y_off, 0), screen_h - s->height);
+
+ if (s->show_region && s->region_win)
+ XMoveWindow(dpy, s->region_win,
+ s->x_off - REGION_WIN_BORDER,
+ s->y_off - REGION_WIN_BORDER);
+ }
+
+ if (s->show_region && same_screen) {
+ if (s->region_win) {
+ XEvent evt = { .type = NoEventMask };
+ // Clean up the events, and do the initial draw or redraw.
+ while (XCheckMaskEvent(dpy, ExposureMask | StructureNotifyMask,
+ &evt))
+ ;
+ if (evt.type)
+ x11grab_draw_region_win(s);
+ } else {
+ x11grab_region_win_init(s);
}
}
- if(!s->nomouse){
- paint_mouse_pointer(image, s);
+ if (s->use_shm) {
+ if (!XShmGetImage(dpy, root, image, x_off, y_off, AllPlanes))
+ av_log(s1, AV_LOG_INFO, "XShmGetImage() failed\n");
+ } else {
+ if (!xget_zpixmap(dpy, root, image, x_off, y_off))
+ av_log(s1, AV_LOG_INFO, "XGetZPixmap() failed\n");
}
+ if (s->draw_mouse && same_screen)
+ paint_mouse_pointer(image, s);
- /* XXX: avoid memcpy */
- memcpy(pkt->data, image->data, s->frame_size);
return s->frame_size;
}
/**
- * Closes x11 frame grabber (public device demuxer API).
+ * Close x11 frame grabber (public device demuxer API).
*
* @param s1 Context from avformat core
* @return 0 success, !0 failure
*/
-static int
-x11grab_read_close(AVFormatContext *s1)
+static int x11grab_read_close(AVFormatContext *s1)
{
- struct x11_grab *x11grab = s1->priv_data;
+ X11GrabContext *x11grab = s1->priv_data;
/* Detach cleanly from shared mem */
if (x11grab->use_shm) {
x11grab->image = NULL;
}
+ if (x11grab->region_win)
+ XDestroyWindow(x11grab->dpy, x11grab->region_win);
+
/* Free X11 display */
XCloseDisplay(x11grab->dpy);
return 0;
}
+#define OFFSET(x) offsetof(X11GrabContext, x)
+#define DEC AV_OPT_FLAG_DECODING_PARAM
+static const AVOption options[] = {
+ { "grab_x", "Initial x coordinate.", OFFSET(x_off), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, DEC },
+ { "grab_y", "Initial y coordinate.", OFFSET(y_off), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, DEC },
+ { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = "vga"}, 0, 0, DEC },
+ { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC },
+ { "draw_mouse", "Draw the mouse pointer.", OFFSET(draw_mouse), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, DEC },
+ { "follow_mouse", "Move the grabbing region when the mouse pointer reaches within specified amount of pixels to the edge of region.",
+ OFFSET(follow_mouse), AV_OPT_TYPE_INT, { .i64 = 0 }, -1, INT_MAX, DEC, "follow_mouse" },
+ { "centered", "Keep the mouse pointer at the center of grabbing region when following.", 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, INT_MIN, INT_MAX, DEC, "follow_mouse" },
+ { "show_region", "Show the grabbing region.", OFFSET(show_region), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, DEC },
+ { NULL },
+};
+
+static const AVClass x11_class = {
+ .class_name = "X11grab indev",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
/** x11 grabber device demuxer declaration */
-AVInputFormat x11_grab_device_demuxer =
-{
- "x11grab",
- NULL_IF_CONFIG_SMALL("X11grab"),
- sizeof(struct x11_grab),
- NULL,
- x11grab_read_header,
- x11grab_read_packet,
- x11grab_read_close,
- .flags = AVFMT_NOFILE,
+AVInputFormat ff_x11grab_demuxer = {
+ .name = "x11grab",
+ .long_name = NULL_IF_CONFIG_SMALL("X11grab"),
+ .priv_data_size = sizeof(X11GrabContext),
+ .read_header = x11grab_read_header,
+ .read_packet = x11grab_read_packet,
+ .read_close = x11grab_read_close,
+ .flags = AVFMT_NOFILE,
+ .priv_class = &x11_class,
};
projects / ffmpeg / blobdiff